Just wanted to share my battle story with Cyano. For 3 full months after installing my new LED and adding another fish/feeding methods i was plagued by Cyano Bacteria. Red slime everywhere suffocating my corals and harming my eyes from the ugly sight of it. I tried tirning the lights off for 3 days, and immediatly doing a water change. I tried reducing feedings and light schedual but none of it worked. Low and behold i tried erythromycin used to treat bacteria infections on fish and in 3 hours the stuff was wiped out. After 48 hours and a final water change, there is no trace of the stuff. 18$ saved me from months of agony dealing with the stuff